Push-button switch



Aug. z3;19z7.7

1,639,757 THESEN PUSH BUTTON SWITCH Original Filed Nov. 16. 1923 Patented Aug. 23, 1927.

' UNITED STATES PATENT OFFICE.

.oLUF Transen', or PHILADELPHIA, Iriiuivsvmrinvia.

PUSH-BUTTON SWITCH.

`Applicatie inea November 16, 1923, serial e'z5,1i4.` Renewed June sai,Y 1927.

My invention relates "to a pushbuttoii switch. The objects are to provide signal-V ing apparatus whereby a sott sound may be 'produced towarn nearby pedestrians such as are approached at ystreet crossings, and a loud and sharp sound to warndistant pedestrians 7 These objects, and other advantageous ends which will be described hereinafter, I attain in the ollowing manner, reference being had to the accompanying drawings in A,which 'Y Iiigurefily is a diagrammatic view ofmy improved signalingapparatus showing their electrical connections,

' Figure 2 a plan view of a push buttonv switch for controlling the apparatus,

Figure '3 asection on line v3 3 of Figure 2, and Y Figure 4 as section on line4--4 ot'. Figure 3.

I have illustrated in the drawings a horn and bell sound producers for my 'improved signaling apparatus but any suitable sound producers may be substituted.

Referring to the drawings, the apparatus consists of a source of electrical energy 1 having one ot itsA poles electrically connected to a stationary contact 2; its other pole connected to a bell 3 and a horn 4; a main contact 5 electrically connected to the horn 4 and an auxiliary contact 6'electrically connected to the bell The bell is used for producing a soft sound to warn nearby pedestrians and the horn is used for producing a loud andsharp sound to warn distant pedestrians.

The stationary contact 2 and the movable contacts 5 and 6 are embodied in a switch 7 which may be operated to cut in a circuit to either sound produced. The construction ot the switch'includes a casing 8 having a groove 9 in its side and an attaching flange 10 at its bottom. The interior of the casing is formed to provide a shoulder 11 near its vertical center and a ledge 12 on the upper edge ot the casing. A base 13 of insulating material, abuts shoulder 11 and is held Vthereby against movement into the casing. The stationary contact 2, as embodiedA in the switch, is in the Jform of a strip 14 se,- cured to the base by a screw 15. 'The strip mayl be shaped in any suitable manner to serve eiiiciently as a stationary contact. The movable contact 5 is in the form of a spring strip .16; secured to the base by screw 17 `A `main button 18,"slidable in the casing,'engages the spring strip 1,6 and is adapted, vwhen pressed, to `move it downward into engagement with strip 14. I The: edge 19 'of the'button engages ledge 12 and is thereby held against movement out oi? the casing. The auxiliary contact 6 is in the form of a spring strip 20 secured to the basebya screw 21. The spring strip 20 consists of an attaching part 22 having a spring arm 23 merging into a contacting lug 24 and having a slot 25 opposite the lug'. A groove 26 in the edge of the main button 18 is disposed opposite groove 9 in the `casing. within groovesl 26 and'9 and is provided with an annular groove 28 for receiving thel edge of slot 25, thus connecting spring strip 20 with 'auxiliary button 27.| The button 27 extends above main button 18 so that it maybe pressed inward without press# An rauxiliary ,push button 27 slides 7 ing button 18. The conduit wires for they y contacts 2, 5 and 6 are passed through a cut-out part 29 in the flange and casing` and anopening 30 in the base. The proper conduit wire is connected to its contact by a screw inthe usual manner.

VVhen the apparatus is used to produce a distant pedestrians, main button 18 is pressed Y inward until movablecontact 5 engages stationary contact 2. completed from one of the poles of source 1 through horn 4 and the `other pole of the source and a loud sound produced. Thus loud Vor soft sounds may be produced at the will of the operator to warn nearby yor distant pedestrians.

lVliile I have described my invention as taking a particular form, it will be understood that the various parts may be changed without depart-ing from the spirit thereof, and hence Ido not limit myself tothe precise construction set forth, but consider that I am at liberty to make such changes A circuit will then be and alterations as fairly come within the n what I claim as neW and desire to secure by Letters Patent is z- 1. A push button switch including a casing; an insulating base within the casing; a stationary Contact seeured to the. base; movable Contacts secured to the base and adapted to engage the stationary Contact; a main button slidable in the easing for moving one of the movable contacts, and an auxiliary button extending above the main button and slidable in a guide channel between the main button and Casing for mov ing the other Contact.

A push button switch including a easing having a groove; an insulating base Within the casino" a stationary Contact seba Cured to the base; a main spring Contact seeured to the base; an auxiliary spring Contact secured to the base; a main button, having a groove opposite the groove in the easing, slidable in the Casing for moving the main contact into engagement with the stationary Contact, and an auxiliary button connected to the auxiliary Contact and sliding Within the grooves.

3. A push button switch including a casing having a groove; an insulating base Within the casing; a stationary Contact se-A cured to the base; a main spring Contact secured to the base; an auxiliary spring contact secured to the base and having a slot; a-inain button having a groove opposite the groove in the easing, slidable in the easing for moving the main spring Contact into engagement with the stationary contact, and an auxiliary button having an annular groove Yfor receiving the edge of the slot and slidable in the grooves.

4. A push button including' a easing liav ing a groove; an insulating base within the casing; a stationary Contact secured to the base; a main spring` Contact secured to the base; an auxiliary spring Contact secured to the bar-3e and having a slot at its free end; a main button, having a groove opposite the groove in the Casing, slidable in the casing for 1'no\1ing` the main Contact into engagement with the stationary Contact, and an auxiliary button slid-able Within the grooves in the main button and the easing, and having an annular groove fitting over the inner Wall of the slot, thereby making a Connection With the auxiliary spring Where by it may be moved into engagement with the stationary Contact.

In testimony whereof I have signed my name to this speeiiication.

OLUF THESEN. 

